Segisaurus Facts
Pronunciation: SEG-ih-SORE-us
Name meaning: Tsegi Lizard
| Diet | Carnivore |
| Height | 0.4m |
| Length | 1m |
| Weight | 3 kg |
| Environment | Land |
| Era | Jurassic |
| Period | Early Jurassic |
| Type | Theropod |
| Location | North America |
Segisaurus was a small theropod dinosaur that lived during the Early Jurassic period, approximately 193 million years ago. This diminutive predator measured just one metre in length, making it one of the smaller dinosaurs known to science. Despite its modest size, Segisaurus was a capable hunter that roamed the ancient landscapes of what is now Arizona.
As a theropod, Segisaurus walked on two legs and possessed the typical carnivorous features of its group, including sharp teeth and clawed hands. Its lightweight build and long legs suggest it was built for speed and agility, likely chasing down small prey such as insects, early mammals, and other small vertebrates. The single known specimen was discovered in the famous red sandstones of Tsegi Canyon, making it the only dinosaur ever found in this particular location.
Segisaurus lived during a time when dinosaurs were still establishing their dominance on Earth. The Early Jurassic period was characterised by warm, humid climates and lush vegetation, providing an ideal environment for small predators like Segisaurus to thrive. Its discovery has helped palaeontologists understand the diversity of small theropods during this crucial period in dinosaur evolution.
Unfortunately, our knowledge of Segisaurus remains limited due to the fragmentary nature of the single known specimen. However, its position within the coelophysid family suggests it shared many characteristics with other early theropods, including a slender build and predatory lifestyle.
What made Segisaurus distinctive?
Segisaurus was distinguished by its very small size, measuring only one metre in length, and its lightweight, gracile build typical of early theropods. Its proportionally long legs suggest it was adapted for quick movement and agility.
Behaviour
Segisaurus was likely an active daytime hunter that relied on speed and agility to catch small prey. Its small size would have allowed it to pursue insects and small vertebrates through dense vegetation and rocky terrain.
Discovery
Segisaurus was first described by Charles Camp in 1936. The original fossils were discovered at Tsegi Canyon, Arizona, USA.
Segisaurus FAQ
What did Segisaurus eat?
Segisaurus was a carnivore that likely fed on small prey including insects, early mammals, lizards, and other small vertebrates. Its sharp teeth and clawed hands were well-suited for catching and processing small animals.
How big was Segisaurus?
Segisaurus was quite small, measuring approximately 1 metre in length and standing about 40 centimetres tall at the hip. It weighed roughly 3 kilograms, making it comparable in size to a large chicken.
When did Segisaurus live?
Segisaurus lived during the
Early Jurassic period, approximately 193 million years ago. This was a time when dinosaurs were diversifying and becoming the dominant land animals.
Where was Segisaurus found?
Segisaurus was discovered in Tsegi Canyon, Arizona, USA. It remains the only dinosaur ever found in this particular location, making it a unique discovery for the region.
How do you pronounce Segisaurus?
Segisaurus is pronounced 'SEG-ih-SORE-us', with emphasis on the first syllable. The name flows smoothly when spoken aloud.
What does Segisaurus mean?
Segisaurus means 'Tsegi Lizard', named after Tsegi Canyon where it was discovered. 'Tsegi' is a Navajo word meaning 'narrow canyon', reflecting the geography of its discovery site.
How fast could Segisaurus run?
The exact running speed of Segisaurus is unknown, but its long legs and lightweight build suggest it was built for speed and agility, likely capable of quick bursts when chasing prey or escaping danger.
What type of dinosaur was Segisaurus?
Segisaurus was a small theropod dinosaur, specifically belonging to the coelophysid family. Theropods were bipedal, predominantly carnivorous dinosaurs that included all the major predatory species.
Was Segisaurus related to birds?
Yes, as a theropod dinosaur, Segisaurus was part of the group that eventually gave rise to modern birds. However, it lived very early in theropod evolution, so it was quite distantly related to the direct ancestors of birds.
How many Segisaurus fossils have been found?
Only one specimen of Segisaurus has ever been discovered. This single fossil was found in the 1930s in Tsegi Canyon, Arizona, making it one of the rarer dinosaur species known to science.
